arch_set_user_pkey_access
int arch_set_user_pkey_access(int pkey, unsigned long init_val);
extern int arch_set_user_pkey_access(int pkey, unsigned long init_val);
ret = arch_set_user_pkey_access(execute_only_pkey, PKEY_DISABLE_ACCESS);
ret = arch_set_user_pkey_access(pkey, init_val);